A Series of Copper-Lanthanide Heterometallic Coordination Polymers Derived from Pyridine-2,3-dicarboxylic Acid and in situ Generated Succinic Acid

作者：Zhang, Ju-Wen; Kan, Xiao-Min; Li, Xiao-Li; Liu, Ying; Liu, Bin-Qiu^*

来源：European Journal of Inorganic Chemistry, 2016, 2016(7): 1060-1067.

DOI：10.1002/ejic.201501328

• Lanthanides
• Copper
• Coordination polymers
• Polymers
• Magnetic properties

A series of copper-lanthanide heterometallic coordination polymers (CPs), [LnCu(2,3-pydc)(2)(suc)(0.5)(H2O)(3)]center dot H2O [Ln = La (1), Pr (2), Nd (3), Sm (4), Gd (5), and Eu (6), 2,3-H(2)pydc = pyridine-2,3-dicarboxylic acid, H(2)suc = succinic acid], [Ln(2)Cu(3)(2,3-pydc)(6)(H2O)(10)]center dot 8H(2)O [Ln = Eu (7), Tb (8), Dy (9), and Er (10)], and [Ln(2)Cu(2,3-pydc)(2)(suc)(mu(2)-OH)(2)(H2O)(2)]center dot 2H(2)O [Ln = Er (11), Yb (12), and Lu (13)], were synthesized by the hydrothermal reactions of LnCl(3)center dot nH(2)O, Cu(NO3)(2)center dot 3H(2)O, pyridine-2,3-dicarboxylic acid (2,3-H(2)pydc), and N,N'-di(4H-1,2,4-triazole)butanamide (dtb). CPs 1-13 possess three types of three-dimensional (3D) frameworks. In 1-6, the dinuclear Cu-2(2,3-pydc)(4) and Ln(2)(COO)(2) units link to each other to form two-dimensional (2D) layers, which are extended by the suc anions into a 3D framework. In 7-10, the lanthanide ions connect the trinuclear Cu-3(2,3-pydc)(6) units into a 3D framework. In 11-13, the mononuclear Cu(2,3-pydc)(2) units bridge the one-dimensional (1D) lanthanide chains into 2D layers, which are linked by the suc anions into a 3D framework. CP 9 shows a field-induced slow magnetic relaxation behavior with a U-eff value of 83.7 K.

• 出版日期2016-3
• 单位渤海大学